Heating-boiler



R. E. STURMAN.

HEATING BOILER.

APPLICATION FILED JUNE 18, 1917.

1,390,838. v I PatentedSept. 13,1921.

2 SHEETS-SHEET I.

R. E. STURMAN..

HEATING BOILER.

APPLICATION FILEDHJUNE 1a, 1917. 1- 390 3 PatentedSept. 13, 1921..

2 SHEETS-SHEET 2.

UNITED STATES Bonnier ns'roaman, or DELANO, mnxmnsora.

v HEATING-BOILER.

Specification of Letters Patent. Patented Sept, 1921 Application filed. Iune18y1917. Serial No. 175,384.

To all whom it may concern:

Be it known that I, ROBERT E. STURMAN, a citizen of the United States,residing at Delano, in the county of'Wright and State of Minnesota,.have invented a new and useful Improvement in Heating-Boilers, of which the following is a specification.

My invention relates to heating boilers and has for its object to provide a novel construction having sections which are secured together and in which water is adapted to circulate. The boiler is provided with a self feeding magazine together with a down draft arrangement which makes it possible to use a low grade of fuel without smoking. A further object is in a round boiler having a round magazine located in the center of the boiler and is adapted to feed the fire so that the diflusionof heat is uniform on the Water flues.

It is also an object to provide a boiler which is low in stature making it easy to fill the magazinewith fueland to completely water jacket the fuel magazine thereby warmingthe fuel before being fed to the fire and aiding combustion. l

Another object is in a boiler where a down draft or an up draft caneasily be obtained.

It is also an object to have an inner cylindrical water chamber which surrounds the adapted to be circulated or zig-zagged through the sections thereby absorbing the largest amount of heat possible from the fire and smoke flues.

In the drawing forming part of this speci- Figure 1 is a side elevation partly in section and partly broken away. i r

Fig. 2 is a section on the line 2-2 of Fi 1. i

s 3 is a section on theline 3-45 of Fig. 4 is a plan view of the boiler with the cover of the magazine removed.

Fig. zine.

5 is a plan of the coverof the maga- Fig. 6 is a sectional view taken onthe line 6--6 of Fig. 3. Fig. 7 is a plan view of the grate showing a portion removed.

Figs. 8, 9 and 10 are detail portions of the grate construction.

' In the drawing, A represents a heating boiler formed with a base portion, B, fire box C, intermediate section D and topsection E. The bottom section B is of ordinary construction and is adapted to form an inclosure for the ash pit. The section B. being provided with anash door 1 in which is formed a draft door 2. The section C is adapted to rest on the flange 3 formed in the base B and The section A is formed with water inlets 6 and a vertical cylindrical water compartment 7 Whichextends about the outer cir oumferenoe of the section C which is connected with an inner vertical cylindrical compartment 8 by means of a series of spoke-like. or: radiating water flues 9. The flues 9 extend approximately from the top to the bottom of the section CJ The. cylindrical chamber 7 is formed on its lower extremity with an inwardly extending- V. shaped chamber 10 which lies adjacent the grate and is adapted to absorb heat from the fire in the boiler. The flues 9 radiate from the compartment 8 like spokes being vertioallyof a narrow thin construction so that they will readily absorb the heat from the combustion chamber to the water contained in them.

The unspent gases and smoke from the fire passthrough the openings 11 which are formed betweenthe fiues 9 and extend vertically in the portion C to the intermediate section D. The intermediate section D is formed with an outer cylindrical water chamber 12 which is connected to a cylincircular, parallel, horizontal chambers 14.

A horizontal smoke and gas chamber 15 drical inner chamber 13 by means of the gases'from the gpassage-ways 11 and carry them in the direction of the arrows to the back of the boiler through the openings 16 into ahorizontal smoke chamber 17 which is surrounded by the wate'rchambers 12, 13 and 14. The openings 16 are separated by means of a channel 18 which is adapted to connectthe inner cylindrical chamber 13 with the downwardly projecting ring-like portion 19 which extends about the lower circumference of the intermediate section D. Thus thechannel 18 prevents water from pocketing in'the depending chamber or ring 19 of the chamber 12,'allowing' a free circulation of the water. y

The smoke and gas after passing through theopening 16 is directed in a circle in the direction of the arrows illustrated in Figs. 3 and 6 in the compartment 17 and out through the" opening 20 p which extends through the upper water chamber 14. The vbafile plate 21 which extends vertically in the circular compartment 17 6 forms a wall which compelst'hesmoke and gas to travel in the direction of thearrows in Fig. 3 to reach the opening 20. As the smoke and gas pass-out-of the opening, 20, they enter the circular chamber 22 formed in the lower partof the sectionE and are directed in the reverse direction to which they traveled in t'he compartment 17 bymeans of the baffle p'lat'e 23 which'is formed vertically in the compartment 22 in the section E in line with 5' one edge-of the opening 20. Thus the smoke 3 passesin the direction of the arrows illustrated in Fig. 4 through-the compartment 17 in the-dome 'or top-"section E and out throughjthe'smoke hood 24 to the chimney. The dome E is formed with a water compartment 25 having water outlets 26 in its upper extremity.

The sections C; D and Bare connected on their inner joints by push nipples 27 and 28;."-The sections and E being connected means of the long push nipple 29. The nipple 29; forming the inner wall of the :water compartment- 13 and also forms a tubular central compartment 30 which connects the upper-portion 31 formedin the section Ef andthe'lower vportion 32 formed in the section C tomake'a round fuelmagazine axially located in the boiler A. The chamber 32 in 'the magazine being larger in ifdiameter than the"portion,=30and is surrounded by: the-waten'cornpartment 8. The "upper portion 31 of themagazine' is; adapted wto flare outwardly andis connected with a 7 conical shaped 'hopper 33 havinga cover 34.

-- The cover 34":-is formed with draft opening'35 and' can be closed or openedabymeans of theldampe'ri36 whichiis' freelyupivoted {to thecover 'byJ-meansof'the bolt 37 5 A seriesbf'smokevorsgasopenings are 'formed between the cylindrical water; chamber'8 and the outlet passage-way 62 which directly connect the chamber 32 with the smoke opening or compartment 15 in the section D. The openings 70 are inline with the openings 11, being separated therefrom by the cylindrical water chamber 8.

A circular damper 38 having short radially extending fingers 39 and operating handle 40 is positioned horizontally between the sectionsCand D and is adapted to lie on the upper surface 41 of the section C. The handle 40 extends outside of the boiler A through the opening 42 so that it can be engaged to rotate the damper 38 to move the fingers 39 to close or open the passageways 70 when it isdesired.

The short fingers 39 of the damper 38 are of suflicient width to completely close the openings 70 when the damper 38 is turned into closed position.

The damper 38 is formed with a circular opening 58 which is adapted to freely eugage against the cylindrical flange 59 on the section D of the boiler so as to guide or center the damper 38 during operation.

When a fire 1s started in the boiler A and a thedamper 38 is ordinarily only opened in starting a fire in the boiler A when the down drafts are closed or used to incr-ease'the draft in the boiler A. Whenever the damper is in open position, opening the passageways 70, it is preferred that the down draft or passage-ways be closed.

The boiler A is provided with a grate F which is made up of a series of grate segments 44. The segments 44 are formed with lugs 45 and 46 on their upper and lower ends by'which they are pivoted in the spider 47 and base B in the semi-circular openings 48 v which are formed in the center of the spider 47 and the flange 60 of the base 13.

As illustrated in Fig. 7, the grate F is adapted to be made up of twelve segments or any other suitable number, only three of these grates being shown in place. The lugs 46 are formed with a gear tooth 49 which 1s adapted to mesh with the teeth 50 formed on the lower side of the mushroom gear 51. The gear 51 has a depending shaft portion 52 which is pivoted in the opening 53 in the center or axis of the spider 47 and the shaft 52has connected thereto alever arm 54 which is pivotally connected'to the operating or reach rod 55 at 56. The reach rod is connected the shaker arm in the usual manner through the o ening57 of the base B (the shaker arm an levernot being shown). The grate F is operated by means of the shaker lever which moves the reach rod 55 back and forth in the direction of the arrows in Fig. 7 and thereby rotating 'thusforminga cone shaped fire on the same when the furnace is in use bringing the fire close to the lower edge of the chamber 8. 15 fire box door 60 whichis illustrated indotted outline in the front of section C and The boiler A is. provided with the usual which isprovided with draft openings 61.

The door 60 isconnected with the chamber 132 throughthe opening 59' which isillustrated" in Fig. 2. The openings 61 form down draft passageways. It will be noted that this is accomplished by the fact that the cylindrical chamber 8 encircles and forms part of the coal magazine and the smoke and gases from the fire must pass down and then up through the side openings 11 around the lower edge of the magazine.

The cold or low temperature water is admitted into the boiler A through the passages or inlets 6 at the bottom of the boiler A and passes from there into the compartment 7 through the radiating fiues 9 into the compartment 8. As the water heats, it rises in the cylindrical compartment 8 and passes out through the circular or ring-like opening 62 into the lower circular compartment 14 and continues to rise through the compartments 12 and 13 into the upper horizontal compartment 14 in the section D. The water is then passed through the circular or ring-like opening 63 into the dome compartment 25 and out through the hot water passage-ways 26 to the radiators of the heating system.

In use of the boiler A, the fire is started on the grate F in the usualmanner and the down draft openings 35 and 61 are closed. The damper 38 being turned into open position to open the passage-ways and allowing direct draftup through the upper circumference of the chamber 32 and directly into the smoke compartment 15 in section D. The draft openings 2 in the door 1 being opened and the usual draft up through the grate F is obtained. After the fire is started sufliciently, the draft opening 2 is closed and the fingers 39 of the damper 38 moved so as to close the openings or passage-ways 70 and either the down draft openings 61 or 35, or both together can be used.

In use of the down draft through the openings 35, there is suflicient space between the fuel to allow air to pass to the fire drawin the fire down against the chamber 10 an distributing the heat about the chambers 7 and 8. The unspent gas and smoke pass up through the openings 11 into the compartment 15 through the opening 16 encircling in the compartment 17, through the Opening 20 and encircling in the opposite direction through the chamber 22 and out through the smoke hood 24: to the chimney.

The *heat from the smoke and unspent gases bein absorbed by the water in the radiating ues 9, compartments 7, S and 10 first, and then in the other compartments as the smoke and gas pass through the boiler.

The magazine is adapted to feed the fire automatically and heating the fuel before it is fed to the fire materially assists in the combustion of the same.

This form of magazine and down draft thus affords the use of a low grade offuel without unnecessary smoke and gives a larger amount of heat from the same amount of fuel. It is a proven fact that the down draft principle is superior and more effective than the up draft and if properly ar ranged, will consume a large amount of the gases and smoke which would ordinarily pass out through the furnace.

The damper 38 together with the openings 70 make the boiler A more practical with the clown draft principle for the rea son that in starting the fire whenever it is desired, a direct upward draft can be ob tained through the chamber 32. This principle allows the easy starting of a fire in the boiler A, giving quick results and absorbing a large amount of heat from the fire.

In accordance with the patent statutes, I have described the principles of operation of my invention, together with the apparatus which I now consider to represent the best embodiment thereof, but I desire to have it understood that the construction is only illustrative and that the invention can be carried out by other means and applied to uses other than those above set forth with in the scope of the following claims:

1. In a boiler of the class described, composed of sections, a fire box section, an outer cylindrical water compartment and an inner cylindrical water compartment formed in said fire box section, radiating flues connecting said outer and inner water compartments, and a ring like opening connectlng said water compartments of said fire box section with the water compartments in the sections above said fire box section.

2. In a boiler of the class described, comprising, a fire box section, a dome section, an intermediate section between said fire box section and dome section, inner and outer cylindrical water compartments formed in said fire box section, horizontal and parallel circular water compartments formed in said intermediate section, a cylindrical outer and'inner water compartment formed in said intermediate section and a circular opening connecting said fire box water compartments with the water compartments of said intermediate and dome sections.

3. In a boiler of the class described, comprising a series of sections, a thimble connectin said sections and adapted to form the wa l of a fuel magazine, a circular heat and magazine chamber formed in the lowermost section, comprising a circular cylindrical water compartment extending about said heat chamber, a circular cylindrical outer Water compartment about the outside surface of the lowermost section, radially ex tending water passages connecting the inner and outer water compartments of the lowermost section, a ring like water opening connectin the lowermost water, compartment with the next adjacent section and short radial water passages connecting said ring like opening with said inner cylindrical water compartment in said lowermost section,

and openings passing from said heat magazine chamber of said lowermost section into the smoke passages of the said adjacent section.

4. In a boiler of the class described, comprising a fire box section, a top section, an intermediate section between said fire box section and top section, cylindrical inner and outer water compartments formed in said fire box section, vertically and radially extending water passages connecting said inner and outer water compartments, a ring like water compartment positioned inside the upper end of said inner compartment, water passages connecting said ring like compartment with said inner compartment, smoke passageways between said last mentioned water passages and a horizontal damper having means for opening or clos- 111g said smoke passageways between said water passages connecting sald inner and ring like water compartments.

ROBERT E. STUR-MAN. 

